Connecting tubes to tube-plates.



No. 643,237. Patented Feb; I3, l9l. 0. M. ROW. CONNECTING TUBES T0 TUBEPLATES.

(Application filed Jan. 18, 1899.) N o M n d e l //v vE/vToR IINTTnnSTATES aTnNT Oiurlcna OLIVER MATTHEVS ROW, OF MANCHESTER, ENGLAND.

CONNECTING TUBES TO TUBEPLATES.

SPECIFICATION forming part of Letters Patent No. 643,237, dated February13, 1900.

Application iiled January 18, 1899. Serial No. 7021564. (No model.) i

To @ZZ whom it may concern.-

Beit known that I, OLIvER MATTHEWS Row, a subject of the Queen of GreatBritain and Ireland, and a resident of Manchester, Eugland, haveinvented Improvements in Ocunectin g Tubes to Tube-Plates for Use inFeed- IVater'Heaters and the Like, (for which I made application lforBritish patent on the 23d day of June, 1898, No. 13,913,) of which thefollowing is a specification.

My invention relates to the more effective attaching of tubes to thetube-plates of feedwater heaters and similar appliances.

The accompanying drawing illustrates my invention as applied to one endof the improved heating-tube for which aUnited States patent was grantedto me on the 6th day of February, 1894, No. 514,338.

The device consists of a bush or plug A of a size about equal to theinternal diameter of the copper tube B to be connected to the tubeplateC. Into this bush A, I screw a copper nipple D, which is flared orexpanded at the end A to more securely fix it into the bush or plug A.This bush or plug, with its connecting-nipple, I knock or drive for ashort distance into the tube B, which is here illustrated as formedunder the before-mentioned patent, and I then roll a groove E behind thebush to prevent it 'moving farther inward, and the portion of tubeprojecting beyond the bush I roll over the end of the bush, as shown atB, and so I firmly secured in position by the nut G on the opposite sideof the tube-plate. An effectivejoint is thus made between the tube-plateand the substance of the tubeV itself and which is found to beparticularly advantageous in xing the form of tube hereinbefore referredto. In most cases the soft copper surface of the tube itself issufficient to form the joint; but packing material may be inserted, iffound desirable.

Having thus particularly described and ascertained the nature of my saidinvention, I declare that what I claim is- In combination, a tube-platewith holes, a tube with inwardly-flanged end, a bush within the tube andimmediately behind the flange, a nipple connected with the bush, a nutscrewing onto the nipple above the tube-plate, and with` theinwardly-anged end of the tube 1ying between the tube-plate and bush, asand for the purposes set forth.

In witness whereof I have hereunto set my hand in the presence of twoWitnesses.

OLIVER MATTHEWS ROW.

Witnesses:

JOHN I. ROYLE, ARTHUR GREsTY.

